WIKA PSD-4 - Page 28

14208834.01 07/2017 EN/DE/FR/ES
28 WIKA operating instructions pressure switch, model PSD-4
EN
Specications
Switching current max. 250 mA
Settling time/response time Analogue signal: ≤ 5 ms
Switching output: ≤ 5 ms
Service life 100 million switching cycles
Voltage supply
Power supply DC 15 ... 35 V
The power supply for the pressure switch must be made via an energy-limited electrical circuit
in accordance with section 9.3 of UL/EN/IEC 61010-1 or an LPS to UL/EN/IEC 60950-1 or
class 2 in accordance with UL1310/UL1585 (NEC or CEC). The voltage supply must be suita-
ble for operation above 2,000 m should the pressure switch be used at this altitude.
Current consumption max. 45 mA for versions without 4 ... 20 mA output signal
max. 70 mA for versions with 4 ... 20 mA output signal
Total current consumption max. 600 mA including switching current
Accuracyspecications
Accuracy, analogue signal ≤ ±0.5 % of span
Including non-linearity, hysteresis, zero oset and end value deviation (corresponds to
measured error per IEC 61298-2).
Non-repeatability, analogue signal ≤ 0.1 % of span (IEC 61298-2)
Long-term drift, analogue signal ≤ ±0.1 % of span (IEC 61298-2)
≤ ±0.2 % of span (IEC 61298-2) for measuring ranges ≤ 0.6 bar (10 psi), ush process connec-
tion, increased overload safety
Turndown, analogue signal The analogue output signal is freely scalable within the range of 5:1
When setting turndown, there is a proportional increase in the measuring deviation and
temperature error.
Accuracy, switching output ≤ ±0.5 % of span
Temperature error in rated
temperature range
maximum: ≤ ±1.5 % of span
maximum: ≤ ±2.5 % of span for increased overload safety and ush versions
Temperature coecients in rated
temperature range
Mean TC zero point ≤ ±0.16 % of span/10 K
Mean TC span ≤ ±0.16 % of span/10 K
9.Specications
MAKGIL VIET NAM